Which one of the following statements

Question:

Which one of the following statements is not a tautology ?

  1. $(\mathrm{p} \wedge \mathrm{q}) \rightarrow \mathrm{p}$

  2. $(p \wedge q) \rightarrow(\sim p) \vee q$

  3. $\mathrm{p} \rightarrow(\mathrm{p} \vee \mathrm{q})$

  4. $(p \vee q) \rightarrow(p \vee(\sim q))$


Correct Option: , 4

Solution:

Tautology

Tautology

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